We have one real production trial on white shrimp, run in Fujian over 82 days. Below is what it recorded — including the numbers that do not flatter us — and the dosing ladder that came out of it, which is the part most farms actually want.
This is the practical output of the trial and the thing to write down. Ratio is Super Zinc to feed:
| Early stage | Do not dose |
|---|---|
| Day 11–30 | 1 : 2,500 |
| Day 31–60 | 1 : 1,000 |
| Day 61 onward | 1 : 500 |
The ladder rises because biomass rises. A fixed ratio through the cycle either overdoses early or underdoses late.
| Location and period | Fujian, China · October 2024 – January 2025 · 82 days |
|---|---|
| System | Earthen pond, freshwater, 1 m depth, 4 paddlewheels, 1 mu |
| Stocking | 300,000 post-larvae |
| Super Zinc used | 45 kg over the cycle |
| Harvest | 5,900 jin · average 13.8 g per shrimp |
| Survival | 71.08% |
| Feed conversion (FCR) | 3.3 |
| Cost | 15.15 RMB/jin · market 29 RMB/jin · net 13.85 RMB/jin |
| Result | 81,687 RMB total profit on the trial |
Food-grade water-dispersible nano zinc oxide with an organic-zinc concentrate. Zinc is a required trace mineral in shrimp nutrition; the argument for a nano-dispersed form is bioavailability at lower inclusion, not a health claim. Regulatory status as a feed additive in your market is your responsibility, and we supply documentation to support it.
We cannot claim that from this data. The trial had no control pond, so the survival figure of 71.08% cannot be attributed to the additive. If survival is your target, run a split-pond trial and we will support it with material and the dosing protocol.
Because it is what the record says. Farm managers read these numbers for a living and will find it. We would rather be the supplier who published it than the one who was caught omitting it.
Nothing early, then 1:2,500 from day 11 to 30, 1:1,000 from day 31 to 60, and 1:500 from day 61. That is Super Zinc to feed by weight.
The trial was freshwater earthen pond. Marine and recirculating systems differ in water chemistry and mineral loading, so treat those as a separate evaluation and tell us the system when you enquire.
Tell us your application — a real person replies within 1–2 business days.